Objective: To investigate the role of prostate specific antigen(PSA) in screening for prostate cancer. Methods: The serum PSA of 4 848 males over 50-years old for serum PSA was evaluated,respectively out of them 33 cases diagnosed as prostate cancer(screening group) were compared in terms of age distribution,level of PSA,clinical stages,Gleason score and treatment modalities with 28 patients in our hospital(clinical group). Results: In the screening group,the positive percentage account for 9.5%(PSA≥4 ng/ml) and the PCa positive rate was 6.8‰(33/4 848).The average age of the patients(73.2?8.0) was insignificant different between these two groups.The percentage of the cases beyond 20 ng/ml PSA in the screening group was significantly lower than that in clinical group,with 42.4% and 71.5% respectively.Furthermore,the cases with clinical stage A+B accounted for 69.7% in the screening group,while it was 35.7% in the clinical group(P

AIM: To study the relationship between multidrug-resistance (MDR1) gene product P-glycoprotein (P-gp) and the volume-activated chloride current. METHODS:The volume-activated chloride current in bovine non-pigmented ciliary epithelial cells was recorded using a whole cell recording technique. An antisense technique was used to inhibit the expression of MDR1 gene. The immunofluorescence of P-gp was monitored with a real-time laser confocal microscope.RESULTS:P-gp immunofluorescence correlated negatively with the concentration of the human MDR1 antisense oligonucleotide. The antisense oligonucleotide inhibited the volume-activated chloride current specifically and partially. The latency of activation of the current increased and the peak current decreased. The percentage of inhibition of peak current correlated positively to the concentration of the antisense oligonucleotide( r =0.99, P

AIM: To investigate the relationship between osmolarity, cell volume and cell proliferation in nasopharyngeal carcinoma cells. METHODS: MTT method was applied to detect the proliferation ability of the poorly-differentiated nasopharyngeal carcinoma cell (CNE-2Z) under various osmolarity conditions. The flow cytometry was used to analyse cell cycle distribution. Cell volume was obtained by the image analysis of living cells and cell viability was determined by the trypan blue assay. RESULTS: Cultivation of cells under the hypertonic conditions of 370 and 440 mOsmol/L increased cell volume by 8.7% and 27.8% and facilitated cell proliferation by 22.2% and 33.9%, respectively. However, hypotonic incubation of cells with osmolarity of 160 and 230 mOsmol/L decreased cell volume by 12.8% and 4.1% and inhibited cell proliferation by 34.0% and 15.6%, respectively. Cell volume was positively correlated with cell proliferation rate. Long-term cultivation of cells under anisotonic conditions did not significantly alter cell cycle distribution, but hypotonic cultivation decreased cell viability. CONCLUSION: Proliferation of nasopharyngeal carcinoma cells was closely correlated with the osmolarity of culture medium and cell volume. Hypotonic cultivation may inhibit cell proliferation by decreasing cell volume to facilitate cell death mechanisms.

Hepatocellular carcinoma (HCC) is one of the most common malignancies worldwide. In ad-dition to genetic alterations, epigenetic inactivation of (tumor suppressor) genes has been recognized as an important and alternative mechanism in tumorigenesis. In recent years, increasing evidence has shown that ep-igenetic silencing of those genes is essential to carcinogenesis and metastasis. Epigenetics include two main forms: histone acetylation and DNA methylation, histone acetylation and DNA hypomethylation can promote gene expression,otherwise, they will inhibit gene expression. It is important to the methylation especially the hypermethylation of the tumor suppressor gene during the hepatocarcinogencsis. The study of epigenetics will be proved valuable for early diagnosis and disease monitoring at hepatocell.

92 specimens from patients with invasive ductal carcinoma were investigated. The expression of vascular endothelial growth factor (VEGF) was demonstrated by immunocytochemical staining with an antibody against VEGF and was quantitatively estimated by using computerized image analysis system. Vessels were immunohistochemically highlighted by using an antibody to CD34, and microvessel density (MVD) was quantified. The postoperative survey in univariate analysis showed that the relapse-free-survival (RFS) time of patients with more than 87 microvessels in single microscopic field was significantly worse compared to that of patients with less than 87 microvessels in node-negative patients (P<0.05). Multivariate analysis confirmed that MVD was an independent prognostic indicator for RFS in node-negative patients and all patients (P<0.05～0.01). In addition, there was a closely positive correlation between VEGF and MVD (P<0.01). The results suggested that VEGF plays crucial roles in the promotion of angiogenesis in primary breast carcinoma. VEGF and MVD are closely correlated with biological behavior of primary breast carcinomas. MVD can provide a useful message in predicting the recurrence or metastasis of tumors.

Objective:To observe the curative effects and the influences of Yueanxin injection (YAXI, 悦安欣注射液) on acute cerebral infarction (ACI) and on blood rheology separately. Methods:Sixtytwo cases with ACI were randomly divided into treated group ( n=31) which was treated with YAXI and control group (n=31) which treated with tetrameth ylp yrazine injection (川芎嗪注射液) as control. Once a day for 30 days as a therape utic course to both groups.The curative effects and the changes in blood rheology parameter s were observed.Results:The marked effective rate (74.2%) and total effective rate (96.8%) in treated g roup were significantly superior to those (38.7% and 67.7% respectively) in cont rol group (P<0.05 or P<0.01). The improvements of blood rheology param eters in tr eated group were significantly better than those in control group (P<0.0 5 or P<0.01).Conclusions:The curative effects of YAXI on ACI are sufficient.

Twenty six patients with fracture of tibial plateau was under arthroscopy assisted reduction, the joint surface of bone graft, and USES the steel plate fixation treatment. Average surgery time was 65 min (70-120 min), average fracture healing time was 15 weeks (12-17 weeks), joint surface anatomical reattachment rate was 92.9%. Using break knee function criteria evaluation of curative effect: 18 cases great 6 cases wed, 2 cases ok, fine rate was 92.3%. No infection, deep venous thrombosis and small leg fascia chamber syndrome and other complications. Conclusion is that treatment of tibial plateau fractures under arthroscope has advantages of small trauma, check intuitively and reset accurately, functional recovery of patients are satisfied, the treatment has certain clinical application value.
Adult ; Arthroscopy ; Female ; Humans ; Male ; Middle Aged ; Minimally Invasive Surgical Procedures ; Tibial Fractures ; surgery ; Treatment Outcome ; Young Adult

Objective To establish the hyperinsulinemic-euglycemic clamp(HEC) technique in conscious rats, and to explore the effect of acute infusion of lipid on glucose infusion rate (GIR) in rats. Methods Ten SD rats were random-ly divided into two groups, 5 rats for each group. The right jugular vein and left carotid artery were catheterized and under-went a HEC with infusion of lipid (intralipid group) for 6 hours, and with continuing infusion of 5%glucose (control group). The plasma levels of free fatty acid(FFA) and GIR were measured by HEC method. Results The level of FFA concentration increased by 17.6-fold, and GIR was reduced by 27%in the intralipid group compared to those of control group (P＜0.001). Conclusion The rat model of HEC has been successfully established by intravenous intralipid infusion, which can be con-firmed by HEC technique.

Objective To study the difgerence between the IAEA code of practice TRS-Z77 and TRS-398 in the determination of the absorbed dose to water for high-energy photon beams using several cylindrical chambers. Methods For 6 different types of cylindrical chambers,the calibration factors ND,W,Q0 in terms of absorbed dose to water were calculated from the air exposure calibration factors N,,and were compared with the ND,W,Q0 measured in European standard laboratory. Accurate measurements were performed in Varian 6 MV photon beam using 6 cylindrical chambers according to TRS-277 and TRS-398.The beam quality correction factors kQ.Q0 as well as the water absorbed doses were compared.Results For the set of chambers,the difference between ND,W,Q0 computed from Nx and ND.-.Q0 obtained in European standard laboratory was 0.13％ ～ 1.30％.The difference of beam quality correction factors for TRS-277 and TRS-398 was 0.09％ ～0.45％.The distinction of the water absorbed doses obtained according to the two different protocols was 0.27％ ～ 1.40％,and was primarily due to their different calibration factors.Conclusions The discrepancy in absorbed doses determined according to two protocols using different cylindrical chambers is clinically acceptable.However,TRS-398 allows a more convenient localization of chambers,provides a more simple formulation,and offers the reduced uncertainty in the dosimetry of radiotherapy beams.

Objective To research the cardioprotective effect of Astragalus Membranaceus Polysaccharide (AMP) on hemodynamic and oxygen free radicals in myocardial ischemia followed by reperfusion. Methods By using experimental rats cardiac model, rats were divided into 3 groups:CG (control group), IR (Ischemia-Referpusion) and AMP (Astragalus Membranaceus Polysaccharide). Results AMP could promote the restoration of LVSP、?dp/dtmax、CF、CO、SV、SI、CI, and decrease the rising of LVEDP and T value distinctively. The recovery of left ventricular function in AMP group was better than that of the ischemia-reperfusion group, which was accompanied with the significant reduction of oxygen free radicals and increase of superoxide dismutase. Conclusion AMP could attenuate ischemia- reperfusion injury and ameliorate functional recovery in isolated rat hearts.